Talking to the skipper of an environmental oil skimmer the other day as he
was installing a new VHF antenna. Asked what he wasinstalling and he said
"Morad, of course". He claims they are the one and only!
Gordon

"Bruce in Alaska" wrote in message
...
In article .com,
"luc" wrote:

what is the specific difference between the "shakespeare junk" and the
other? Are the specs different, or the construction, or both?


Design, Construction, Materials, and real world Spec's. Most of the
Morad Atennas were designed by Eddie Zanbergen (rip), who spent a
lifetime in the Marine Radio OEM business. He was Chief Engineer
at Northern Radio Company in his early career, and then left and started
Morad Electronics, with a partner, because he could buy the quality
of antennas that he wanted for the radio's that he designed, that were
used all over Alaska and throught the Pacific Fishing Fleet.

Bruce in alaska
--
add a 2 before @

While on the topic of antennas, what do you all think about the issue of RF
exposure and the recomendation that omni directional antennas with a gain of
under 9 dB be mounted 5 meters (15 ft) above deck level?

Even the 1 meter above head level given as minimum height for the base of
the antenna seems to be ignored on many boats.

surfnturf

In article WN_Yf.1391$_u1.990@pd7tw2no, "surfnturf" wrote:
While on the topic of antennas, what do you all think about the issue of RF
exposure and the recomendation that omni directional antennas with a gain of
under 9 dB be mounted 5 meters (15 ft) above deck level?

Even the 1 meter above head level given as minimum height for the base of
the antenna seems to be ignored on many boats.

I don't even like being across the street from a big tower. There are nearly
a hundred services on that including high powered TV and FM stations.
I get passive current meters to raise the needle across the street.
My car remote starter used to be fine on top the hill. At one point
it lost much of its range near this hill because of some new service.
I have been on some small boats looking at that radar spinning.
I guess I don't like the idea of my 3 dB Metz mounted on the front of my
small boat a couple feet from the wheel, but even though I don't like the ideas,
I still use them radios. If I use a 1/4 wave whip antenna, I sure as hell not going to
raise it high in the air. Worse case scenereo, opperating a handheld.

greg

In article WN_Yf.1391$_u1.990@pd7tw2no, "surfnturf"
wrote:

While on the topic of antennas, what do you all think about the issue of RF
exposure and the recomendation that omni directional antennas with a gain of
under 9 dB be mounted 5 meters (15 ft) above deck level?

Even the 1 meter above head level given as minimum height for the base of
the antenna seems to be ignored on many boats.

surfnturf



RF Radiation is NOT ever going to be a problem on ANY non-commercial
vessel. Period. None of the radiators that one can buy and install
ever even come close to maximum RF Radiations Power Densities considered
the Safe Levels. The same is true for most commercial Marine
installations. My only concern would be to make sure that any MF/HF
Antenna system be well insulated at any place where a person could come
in contact with it. GTO-15 certainly would do this job for wire
antennas, or a nonconductive insulating layer applied to any other
antenna section that is within reach of a humans. The worst that could
happen, should a person come in contact with the above, while
transmitting, is that they could get an RF Burn, that is going to smart
for a few days, but heck, an operator can get that, from a MF/HF Radio
that doesn't have an adiquate RF Ground, from the Mic Hangup Button.

Old Chief Lynn, will certainly testify to the above.....

Military Vessels are a completely different can of worms, and they ALL
have proceedures, and Operational Rules that are in place to protect
operators and others who work in proximitry to the Radiating Surfaces.

Bruce in alaska
--
add a 2 before @

In article , Bruce in Alaska wrote:
In article WN_Yf.1391$_u1.990@pd7tw2no, "surfnturf"
wrote:

While on the topic of antennas, what do you all think about the issue of RF
exposure and the recomendation that omni directional antennas with a gain of
under 9 dB be mounted 5 meters (15 ft) above deck level?

Even the 1 meter above head level given as minimum height for the base of
the antenna seems to be ignored on many boats.

surfnturf



RF Radiation is NOT ever going to be a problem on ANY non-commercial
vessel. Period. None of the radiators that one can buy and install
ever even come close to maximum RF Radiations Power Densities considered
the Safe Levels. The same is true for most commercial Marine
installations. My only concern would be to make sure that any MF/HF
Antenna system be well insulated at any place where a person could come
in contact with it. GTO-15 certainly would do this job for wire
antennas, or a nonconductive insulating layer applied to any other
antenna section that is within reach of a humans. The worst that could
happen, should a person come in contact with the above, while
transmitting, is that they could get an RF Burn, that is going to smart

When I was in the Army, I would test my transmitter/antenna system
out by touching the antenna to get a burn and I think I learned that from others, don't
remember. If it burned, then it was OK. The antenna was a 1/4 wave vertical and transmitted
to the Northrop drone planes. I later made a separate box to have a lamp indicator
when placed near the antenna. The hing was, there was no indiction on the transmitter
if a cable connection was bad.

When I was on a Carnival cruise in 1986, I ventured up to the radio room. Took me back,
I saw a man using a bug or some kind of key, sending CW. The antenna
wire came out of the rack, up the wall, along side of which was a light bulb flashing in tune with
the CW. I thought it was pretty neat.

greg

In article ,
(GregS) wrote:



When I was in the Army, I would test my transmitter/antenna system
out by touching the antenna to get a burn and I think I learned that from
others, don't
remember. If it burned, then it was OK. The antenna was a 1/4 wave vertical
and transmitted
to the Northrop drone planes. I later made a separate box to have a lamp
indicator
when placed near the antenna. The hing was, there was no indiction on the
transmitter
if a cable connection was bad.

When I was on a Carnival cruise in 1986, I ventured up to the radio room.
Took me back,
I saw a man using a bug or some kind of key, sending CW. The antenna
wire came out of the rack, up the wall, along side of which was a light bulb
flashing in tune with
the CW. I thought it was pretty neat.

greg


For SOLAS Inspected vessels an RF Indicator is part of the Required
Equipment for each Transmitter. This is a device that indicates that RF
Energy is present at the Antenna Port of the transmitter. I learned
very early in my career that an NE2 Neon Light taped to the antenna
just above the antenna tuner, would light up, when the transmitter was
in operation. These cost $.20 each, and the FCC Inspectors would accept
them, as fullfilling that requirement. For VHF's however, we always
used the Radio Shack FS1 Field Strength Meter/SWR Bridge, which used to
be $9.95, back in the day. I understand that these are now very hard to
find, and I am not sure what folks are using on SOLAS Inspected vessels
these days. Maybe Lynn knows.....


Bruce in alaska
--
add a 2 before @

"Bruce in Alaska" wrote:
For SOLAS Inspected vessels an RF Indicator is part of the Required
Equipment for each Transmitter. This is a device that indicates that RF
Energy is present at the Antenna Port of the transmitter. I learned
very early in my career that an NE2 Neon Light taped to the antenna
just above the antenna tuner, would light up, when the transmitter was
in operation. These cost $.20 each, and the FCC Inspectors would accept
them, as fullfilling that requirement. For VHF's however, we always
used the Radio Shack FS1 Field Strength Meter/SWR Bridge, which used to
be $9.95, back in the day. I understand that these are now very hard to
find, and I am not sure what folks are using on SOLAS Inspected vessels
these days. Maybe Lynn knows.....


Bruce in alaska

RF indicators: Yes, we've put on a few Radio Shack SWR bridges as well
as some Vanco's, which came in a handy vertical case configuration. I've got
a Vanco in my 10 meter coax now.... it was put there to tune my attic
dipole. (before I got my snazzy MFJ-259)
I've never done this newly authorized contract SOLAS inspection by
myself. When I was still in the business, the FCC's field engineer did the
inspecting, and I was hired to tag along and keep discrepancies from
becoming open warfare. Of course if I was the regular servicing tech, there
weren't and discrepancies. Yoou Betcha! Wasn't Zinns, or something like
that, the nice guy that liked to go to a nice place for lunch and tell
inspection humor stories? He was my favorite inspector.
Old Chief Lynn

"Lynn Coffelt" wrote in news:e16m9n$vnv$1
@emma.aioe.org:

Wasn't Zinns, or something like
that, the nice guy that liked to go to a nice place for lunch and tell
inspection humor stories? He was my favorite inspector.


You boys needed to meet Mr Sheehan, the FCC inspector from Savannah. His
boss had to go retrieve him from a small town lockup when he barged into
the radio room of a small town sheriff's office demanding to see the
transmitter without identifying himself, properly.

Over here, we all miss Mr Sheehan....(c;

In article ,
"Lynn Coffelt" wrote:


RF indicators: Yes, we've put on a few Radio Shack SWR bridges as well
as some Vanco's, which came in a handy vertical case configuration. I've got
a Vanco in my 10 meter coax now.... it was put there to tune my attic
dipole. (before I got my snazzy MFJ-259)
I've never done this newly authorized contract SOLAS inspection by
myself. When I was still in the business, the FCC's field engineer did the
inspecting, and I was hired to tag along and keep discrepancies from
becoming open warfare. Of course if I was the regular servicing tech, there
weren't and discrepancies. Yoou Betcha! Wasn't Zinns, or something like
that, the nice guy that liked to go to a nice place for lunch and tell
inspection humor stories? He was my favorite inspector.
Old Chief Lynn


Bob Zinns was one of the best FCC Engineers that worked out of the
Seattle Field Office. I think that Pete Baliogenn, was before your time,
but he was the "*******" that always found something to RDI (Repaired
during Inspection) during any inspection. He carried a Black Book, that
we all called, the "Baliogenn Bible", that had all the non-Rule Rules in
it, and he could ALWAYS find something to bitch about. I figured out,
early on, that if Pete was coming to do an Inspection, that I needed to
leave at least one "Glaring" ommission for him to find, that was easy to
fix on the spot, and after he found it, and I fixed it, he would be alot
more reasonable about the rest of the stuff. Years later, when I joined
the FCC, as a Resident Field Agent, I did my initial training with the
Seattle Field Office, and had Gary Solsby as my Training Officer. I
still drop in on those guys, and gals when I get down that way.

Bruce in alaska
--
add a 2 before @

Bruce in Alaska wrote in news:bruceg-
:

I learned
very early in my career that an NE2 Neon Light taped to the antenna
just above the antenna tuner, would light up, when the transmitter was
in operation.

Just unplug any florescent tube from one of the cabin lights. Tape it to
the antenna about where the guests hang onto the insulated backstay. At
150 watts it's quite bright in the dark and modulated by the mic audio very
nicely.

Have a nontechie guest hold a florescent tube in his/her hand and move it
up near the antenna while you're on the air. Great fun to watch their
faces when it lights up in their hands.

Of course, it's more fun at 10KW. They don't need to be near the
antenna....(c; Just hand them the lit tube you've been holding when they
come around the corner....(c; "Here, hold this a minute, wouldya? I'm
trying to tune this transmitter and need two hands."